CN109856464A - It is a kind of for spaceborne very low frequency solar radio radiation observation system - Google Patents
It is a kind of for spaceborne very low frequency solar radio radiation observation system Download PDFInfo
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Abstract
The invention discloses a kind of for spaceborne very low frequency solar radio radiation observation system, it is observed for low frequency solar radio radiation signal of 100KHz-20MHz comprising three electric-field sensors, three sets of analog receivers, digital sampling and processing, when frequency module, power module, memory module；Three electric-field sensors are connect with three sets of analog receivers respectively, three sets of analog receivers, when frequency module connect respectively with digital sampling and processing, digital sampling and processing is connect with memory module, and digital sampling and processing, three sets of analog receivers are connect with power module respectively；Present system may determine that corona casts the motion conditions of substance, can be predicted following Space weather event, be prejudged.
Description
Technical field
The present invention relates to a kind of for spaceborne very low frequency solar radio radiation observation system, suitable for based on satellite platform
The observation of 100KHz-20MHz frequency range solar radio radiation can detect corona using orthogonal space three-dimensional electric field sensor and cast substance
Electromagnetic wave of the CME in three dimensions, and then judge the direction of motion of CME.
Background technique
The sun is the celestial body most close with human production life relationship, its light and heat it is warm the earth, the earth is provided
Appropriate environment necessary to upper all life activity.The sun is very active celestial body again, often has violent activity and quick-fried
It was found that as.For a large amount of solar burst event, including solar flare, coronal mass ejection (CME), the filaments of sun/prominence outburst and jet flow
Etc., people have carried out a large amount of observation and theoretical research.Wherein, solar flare and coronal mass ejection (CME) be most it is violent too
Sun outburst phenomenon.In ultraviolet and X-ray wave band, solar flare generates ultraviolet and X with the intensity for being more than usually solar radiation hundreds of thousands times
Ray radiation causes acutely to disturb to earth ionosphere, directly affects the short-wave radio communication on ground.And coronal mass ejection is thrown
It penetrates (CME) and carries a large amount of plasma species, interplanetary space is thrown to the speed per second more than thousand kilometers, to solar-terrestrial physics
Environment and earth's magnetic field generate acutely disturbance, not only affect communication, navigation, the transmitting of spacecraft and operation, astronaut and
Across the health of polar region aircrew, and the safety etc. of remote distance power transport net and oil and gas transportation pipeline is affected,
Many detrimental effects are caused to the production and living of the mankind.
Solar windstorm is using strong solar flare and coronal mass ejection as the inswept interplanetary sky of the solar burst event of representative
Between, the entire physical process of space environment is propagated, develops, interacted and influence in interplanetary space.Solar windstorm is derived from
Complicated electromagnetic interaction in solar atmosphere, very disruptive and sudden, just as in earth atmosphere cyclone, typhoon and
Severe tropical storm.The solar electromagnetic radiation acutely increased in solar windstorm seriously affects solar-terrestrial environment, and leads to mankind's electronics skill
The paralysis of art system.Research in terms of due to solar electromagnetic radiation not only facilitates the physical essence that people understand solar windstorm,
And facilitates people and the disastrous space weather that solar windstorm causes is forecast and early warning.
What disastrous space weather or solar windstorm were usually caused by solar flare and CME, therefore to disastrous space
The forecast and early warning of weather need to carry out real-time and round-the-clock monitoring to solar flare and CME.Radio be solar windstorm i.e.
When respond, when strong solar flare and coronal mass ejection occur, the phenomenon that radio flow can enhance therewith referred to as solar radio burst,
In metric wave, decameter wave to km wave band, burst with relevant plasma resonance be it is leading, the property of plasma resonance is determined
Fixed, the occurrence frequency of different bursts corresponds to different corona position and physical environment, can be with according to its spectrum morphology
Solar radio solar radio burst is divided into I, II, III, IV, V-type radio storm and its adjoint fine structure.Wherein, II type radio storm is CME
The best tracer of shock wave.CME is quickly moved in corona and interplanetary space, when the speed of CME is more than local A Erfen speed
When spending, CME shock wave can be generated, CME shock wave is difficult to be observed on coronagraph, therefore when the motion range of CME is more than corona
When the observation scope of instrument, or due to the CME face earth, when not having any response on coronagraph, detection CME shock wave becomes
Unique means that will be seen that CME, therefore the observation to II type radio storm (that is: the tracer of CME shock wave), to disastrous space
The early-warning and predicting of weather has important practical value；Type III radio storm be high-power electron beam moved in corona most preferably show
Track device is that the sun such as solar flare/CME are quick-fried since it reflects the physical processes such as the release of solar burst energy and particle acceleration
The tendency of hair；Energy release process small in corona and Coronal Magnetic Field small ruler when radio fine structure then reflects solar burst
Spend change procedure.
Decameter wave, hectometer wave and kilometre wave (or are lower than 30MHz radio frequency (RF) range below, are redefined at present
For ultra-long wavelength (ULW)), belong to the observation scope of very low frequency radio.In the observed planet of this wave band
Border II type radio storm and type III radio storm can track extraterrestrial CME shock wave and high-power electron beam, according to corona density mould
Type can also predict the speed of CME/ shock wave and reach the time of the earth, therefore the radio observation of very low frequency is in the pre- of space weather
Report and warning aspect, there is irreplaceable role.And absorption and reflex due to earth atmosphere to electromagnetic wave, for very low
The observation of frequency must be in the spatial observation outside earth atmosphere, the observation of the frequency range not yet domestic at present.Therefore, with China pair
The raising of the early-warning and predicting demand of space weather, the very low frequency space weather radio spectrograph for establishing China are particularly important.
Summary of the invention
Object of the present invention is to a kind of for spaceborne very low frequency solar radio radiation observation system, be primarily adapted for use in satellite platform
The observation of electromagnetic wave generated when upper realization is to 100KHz-20MHz coronal mass ejection, while passing through three orthogonal electric field sensings
Device may determine that corona casts the direction of motion of substance, and then makes and preliminary sentencing to the Space weather event that may occur of future
It is disconnected.
The present invention is achieved by the following technical solution:
The present invention is used for spaceborne very low frequency solar radio radiation observation system, receives three by three orthogonal electric-field sensors
The electromagnetic wave in a direction is modeled receiver and acquires line frequency spectrum point of going forward side by side after the independent analog receiver filtering in Jing San Road, amplification
Analysis, when frequency module to whole system provide temporal information, including second signal, AD driving signal etc., power module is to whole system
Different voltage outputs is provided.
The present invention is used for spaceborne very low frequency solar radio radiation observation system, is penetrated for the low frequency sun of 100KHz-20MHz
Electric detonation hair be observed comprising three electric-field sensors, three sets of analog receivers, digital sampling and processing, when frequency module,
Power module, memory module；Three electric-field sensors are connect with three sets of analog receivers respectively, three sets of analog receivers, time-frequencies
Module is connect with digital sampling and processing respectively, and digital sampling and processing is connect with memory module, data acquisition process mould
Block, three sets of analog receivers are connect with power module respectively.
Three orthogonal electric-field sensors, three sets of analog receivers, digital sampling and processing, time-frequencies are introduced individually below
Several parts such as module, power module；
1, three orthogonal electric-field sensors
Three electric-field sensors are shunk in satellite launch to be arranged in satellite external surface, is being defended by Conventional spatial expanding unit
Star is spread out after entering the orbit, and electric-field sensor is low-loss metal bar, such as low-loss metal is beallon, and length is 5 meters
More than, three electric-field sensors are arranged on satellite by bracket in tri- omnidirectional distribution state of X, Y, Z, and wherein X-direction is direction
Solar direction, Y-axis are to be parallel to solar direction, and the plane that Z axis is constituted perpendicular to X-axis, Y-axis, this just constitutes a direction too
The orthogonal test three-dimensional system of coordinate of sun, for measuring X, Y, the electric field strength E in Z-directionX、EY、EZ；And it will be on three directions
Electric field signal Ex, Ey, Ez determine the arrival bearing of signal by the ratio between three electric field strengths.
2, analog receiver
Three sets of analog receivers form an analog receiver module, the corresponding electric field sensing of every suit analog receiver
Device；
Analog receiver first, it is main to realize the functions such as amplification, filtering to antenna (electric-field sensor) reception signal.By
It is radiated in existing below the quasi- thermal noise of plasma in 100KHz, it is necessary to be filtered out using filter, prevent from interfering；In addition,
The interference aliasing of 20MHz or more enters in ADC sample strip in order to prevent, it is necessary to low-pass filter is used inside receiver.
Analog receiver is amplified by front-end low noise amplifier module, mimic high pass filter (passband > 80kHz), second level
Device, simulation low-pass filter (passband < 50MHz) are sequentially connected composition, and low noise amplifier module is connect with electric-field sensor,
Simulation low-pass filter is connect with digital sampling and processing；
Front-end low noise amplifier module, which undertakes, amplifies function to signal, it is desirable that its noise is less thanIt puts
Big device gain is not less than 30dB, by low noise LDO (low dropout regulator, the low pressure difference linearity in power module
Voltage-stablizer) modules with power, which is mainly placed in that satellite capsule is external, passes through connector on celestial body surface and simulation is high
Bandpass filter input is connected；
Mimic high pass filter, which mainly undertakes, inhibits low frequency Johnson noise and plasma local radiated noise
Effect, since the noise is mainly in 80kHz hereinafter, thus using the mimic high pass filter of passband > 80kHz to above-mentioned noise
Inhibited；The output of mimic high pass filter is connected with the input of two-stage amplifier, and mimic high pass filter is mainly placed in
Satellite capsule is external, is connected by the connector on celestial body surface with two-stage amplifier input；
Two-stage amplifier undertakes the function that is further amplified to signal, and amplifier gain is not less than 30dB, by power-supply system
In high power D C-DC modules with power, output be connected with the input of simulation low-pass filter；
Simulation low-pass filter, which mainly undertakes, filters out complete machine internal interference signals, while preventing data acquisition process mould
Block and out-of-band interference generate aliasing.
3, digital sampling and processing
Digital sampling and processing is sent out by 3 high-speed AD converters (ADC), FPGA signal processing core chips, signal
Unit is sent to be sequentially connected composition, simulation low-pass filter is connect with high-speed AD converter；According to nyquist sampling theorem and
The sample rate of solar radio burst dynamic range of signals, ADC is not lower than 80Msps, according to solar radio burst flow compared to
Quiet flow uses quantization digit for 10bit or more ADC chip in the feature of 30-40dB or more；
FPGA signal processing core chips further include:
Angle calculation module, the power that three electric-field sensor output ends are generated, ratio determines arrival bearing two-by-two, and
Data will be calculated, ground center or/and temporary memory module are passed back by signal transmitting unit.
4, frequency module when
The module is made of spaceborne high precision clock and clock driver chip, spaceborne high precision clock and clock driver chip
Connection, clock driver chip are connect with high-speed AD converter (ADC), FPGA signal processing core chips respectively；
The spaceborne high precision clock output 1pps signal amplifies through clock driver chip, as ADC acquisition and FPGA signal
The synchronization signal of processing core chip signal processing, while 5MHz the 10MHz standard signal of spaceborne high precision clock output
Amplify frequency required for frequency multiplication of phase locked loop is acquired to ADC and FPGA signal processing core chips work institute through clock driver chip
The frequency needed, the clock drive signals as ADC, FPGA signal processing core chips.
5, power module
Power module is made of high power D C-DC module and low noise LDO module, and wherein high power D C-DC module is distinguished
It is connect simultaneously with two-stage amplifier, high-speed AD converter, FPGA signal processing core chips, low noise LDO module, memory module
Power supply；Low noise LDO module, mainly to the front-end low noise amplifier module for power supply of analog receiver.
6, layout arranges
The considerations of for Electro Magnetic Compatibility, total system is divided into two parts: satellite capsule outer portion and cabin inner part, wherein
Part includes three orthogonal electric-field sensors, the low noise amplifier module in analog receiver module, analog high-pass out of my cabin
Low noise LDO module in filter, power module, and low noise amplifier module, mimic high pass filter, low noise LDO
Module is arranged in independent shielding storehouse out of my cabin；It is connected by celestial body surface aviation socket, comprising: LDO input voltage cable, electricity
Field sensor controls cable, low noise amplifier output signal cable etc.；Remaining component in this system is placed in satellite capsule
Portion.
Effect of the invention:
1, solar radio burst is observed using three orthogonal electric-field sensor buildings, it can be by three sensors
The different voltages value of induction judges signal source direction, further judge the motion conditions of corona projectile substance, can be to not
The Space weather event come is predicted, is prejudged；
2, using the inside and outside distribution design scheme of satellite capsule, the low noise amplifier module vulnerable to interference is placed in out of my cabin, is led to
Satellite capsule body surface face is crossed by the strong electromagnetic radiations interference and insulation such as inside satellite such as FPGA, DC-DC power source, reduces electromagnetic interference shadow
It rings, while using independent low noise LDO module, reduce power supply unstability influences to amplifier bring；
3, this system uses high-speed digital signal processor, and processing, the product graded tasks of signal can be realized on star, is subtracted significantly
Lack transmitted data amount, alleviates the transmission pressure between satellite-ground link.
Detailed description of the invention
Fig. 1 is present system structural schematic diagram；
Fig. 2 is analog receiver structural schematic diagram；
Fig. 3 is three orthogonal electric field sensor measurement arrival bearing's schematic diagrames；
Fig. 4 is the circuit diagram of low noise amplifier module and mimic high pass filter；
Fig. 5 is two-stage amplifier, simulation low-pass filter circuit diagram.
Specific embodiment
Below by drawings and examples, invention is further described in detail, but the scope of the present invention is not limited to
The content.
Embodiment 1: as shown in Figure 1-3, this is directed to 100KHz- for spaceborne very low frequency solar radio radiation observation system
The low frequency solar radio burst of 20MHz is observed comprising three electric-field sensors, three sets of simulations-digital receiver connection,
Digital sampling and processing, when frequency module, power module, memory module；Three electric-field sensors respectively with three sets of analog to digital
Receiver connection, three sets of analog receivers, when frequency module connect respectively with digital sampling and processing, digital sampling and processing
It is connect with memory module, digital sampling and processing, three sets of analog receivers are connect with power module respectively；
The electric-field sensor is beallon bar, and three electric-field sensors are in tri- omnidirectional distribution shape of X, Y, Z by bracket
State is arranged on satellite, and wherein X-direction is towards solar direction, and Y-axis is to be parallel to solar direction, and Z axis is perpendicular to X-axis, Y-axis structure
At plane, that is, the three-dimensional space formed is towards the sun；Analog receiver is filtered by low noise amplifier module, analog high-pass
Device, two-stage amplifier, simulation low-pass filter are sequentially connected composition；
Since space electric field is there are tri- components of Ex, Ey, Ez, intensity density is respectively Ex Vm-1Hz-1/2、Ey V m- 1Hz-1/2、Ez Vm-1Hz-1/2, establishing in tri- direction effective lengths of X, Y, Z is Leff-x、Leff-y、Leff-zElectric-field sensor,
Rear end integral bandwidth is respectively Bx, By, Bz and in the case that input impedance is respectively Rx, Ry, Rz, three electric-field sensors outputs
The power that end generates is respectively as follows:
Px=(Ex·Leff-x)2·Bx/Rx
Py=(Ey·Leff-y)2·By/Ry
Pz=(Ez·Leff-z)2·Bz/Rz
Wherein, physical length is the electric-field sensor of L, effective length LeffIt is as follows with the corresponding relationship of physical length L:
It integrates bandwidth B and is equal to spectral resolution Δ f, depend on the sample rate f of FPGA signal processing core chipssWith
FFT；Change points N, generally in tens kHz or so；I.e.
R is the input impedance of analog receiver, generally in M Ω magnitude.
According to the three direction electric field components that measurement obtains, arrival bearing can be determined according to ratio two-by-two, wherein three angles
Spend (Fig. 3) can be by being calculated as follows:
Low noise amplifier module
Since the size of interplanetary very low frequency radio exploring antenna limits, according to external relevant references and satellite experience
It introduces, the input resistance of detection system should be at 106 ohm or more, and input capacitance then should be in 3.0pF hereinafter, directlying adopt radio frequency
LNA or balun are obviously unable to reach this requirement, it is therefore desirable to detector input terminal addition level-one preamplifier come into
Row impedance transformation.For 100kHz~20MHz band receiver, the radio frequency operational amplifier of low noise voltage feedback-type can be used
Building.
In the present invention, the first order using AD8004SQ (aerospace grade), as first order low-noise amplifier, (put by low noise
Big device module), work noise is only are as follows:Lower than needing to detect lowest noise, which is built into the first order
Low-noise amplifier can effectively reduce the input noise (Fig. 4) of entire receiver system.
Simultaneously after first order low-noise amplifier, since interplanetary very low frequency radio detection system works in base band,
It needs that the quasi- thermal noise of low frequency (shot noise) and the resonant noise fp of local is inhibited to be generally below 100kHz simultaneously, in 100kHz
There is stronger noise to be difficult to deduct noise and solar radio radiation signal, the present invention closely follows after first order low-noise amplifier thus
Mimic high pass filter filters out above-mentioned noise.
The Calculation of Sensitivity of front-end low noise amplifier module is as follows:
It is the guarantee of noise first
The gain of two-stage amplifier is followed by determined by sensitivity, if the sensitivity that we need isThe power that the signal is generated in day line back end, AD input terminal are as follows:
Note: spectral resolution B=12.5kHz, RinIt is input resistance；
High-speed AD converter uses AD6645 minimum energy identification signal power for ± 0.5LSB (r.m.s)
Its minimum can identify power are as follows:Wherein
Amplification factor needed for two-stage amplifier is about (power gain) thus:
G=Pmin-Ps=-116- (- 166)=50dB；
As shown in figure 5, the present embodiment uses the core chips of AD8021SQ (aerospace grade) as second level amplifier；Amplification
Device uses two-stage AD8021SQ two-stage magnification scheme, the amplifying circuit that two-stage AD8021SQ is constituted, and power gain reaches about 50-
60dB or so meets observation requirements；Connection quadravalence Butterworth LPF is exported simultaneously, is filtered out High-frequency Interference, is prevented ADC
Aliasing signal is generated when acquisition.
The digital sampling and processing is sent by 3 high-speed AD converters, FPGA signal processing core chips, signal
Unit is sequentially connected composition；
For converter using AD6645 as analog-digital converter, main indicator is as follows:
1, four-way synchronous acquisition, sample rate are as follows: 80Msps are realized in single-chip；
2, quantization digit: 14bit；
3, spurious-free dynamic range: 100dBFs；
4, reading speed can be arranged by FPGA, realizes quiet and outburst both of which seamless switching；
5, its internal included acquisition holding circuit T/H, reduces the design of peripheral circuit；
6, there is good anti-high energy particle performance simultaneously.
Consider from anti-interference and reliability perspectives, it is suitable that the maximum difficult point of one interspace electronic system of design is to select
Digital display circuit implementation；In whole system, digital display circuit has maximum functional density, and device design difficulty is larger, resists
Interference performance and reliability are also worst；According to an international practice, we construct this using the IGLOO aerospace grade FPGA of Actel company
The numerical portion of observation system.IGLOO realizes that speed and large capacity can not and be led using unique Flash Fei Yishi technique
The FPGA of stream compares (maximum d type flip flop capacity is only 75K, and maximum operating frequency is then in 100MHz or so).But also just because of
Using the Flash technique of Fei Yishi, universe High energy particles Radiation has natural immunity, and quiescent dissipation is extremely low.On
The demand that advantage has been just met for aerospace electron is stated, therefore the Series FPGA is famous in aerospace field.
To reach frequency resolution requirements, the fft algorithm in FPGA must have enough length, according to the prior art I
To implement length to it respectively be 8192 points of FFT, frequency resolution will be respectively up to 6kHz or so.
The power module is made of high power D C-DC module and low noise LDO module；
Most satellites are by the way of Switching Power Supply in the world, therefore generate biggish noise and ripple, with electronics
The LDO chip (linear voltage converter) of the development of technology, advanced low-power consumption is all mentioned well in noise, power consumption
It rises；
But LDO chip is lower in terms of output power, cannot support the power supply of whole load completely, we intend adopting thus
It takes in front-end low noise part using LDO, and it is linear using load capacity stronger DC-DC or high-power in back-end digital part
Voltage-stablizer scheme reduces noise by the shielding isolation between analog portion and numerical portion；
It is the power supply of front end first order low-noise amplifier for this this load proposed adoption LDO linear voltage regulator ADP7142, this is steady
The main indicator of depressor is as follows:
1. low noise: 11 μ Vrms, it is unrelated with fixed output voltage；
2. power supply rejection ratio (PSRR): 88dB (10KHz), 68dB (100KHz), 50dB (1MHz) (VOUT≤5V, Vin=
7V)；
3. input voltage range: 2.7V to 40V (completely compatible satellite offer voltage)；
4. maximum output current: 200mA；
5. the precision in route, load and temperature range: ± 1.1% (TJ=-40 DEG C to+85 DEG C), ± 1.8% (TJ=-
40 DEG C to+125 DEG C)；
Rear end provides 3.3V, 1.2V using conventional high-power linear regulator chip, to FPGA, provides 5V to memory module,
To the operating voltage and reference voltage of A/D chip 1.8V.
Frequency module includes spaceborne high precision clock and clock driver chip when described, and spaceborne high precision clock and clock drive
Chip connection, clock driver chip are connect with high-speed AD converter, FPGA signal processing core chips respectively；
Time-frequency needs following several signals altogether:
1, satellite atomic clock provides the standard signal of 5MHz or 10MHz, the clock for being injected on signal-processing board
Driving chip, frequency required for working through amplification frequency multiplication of phase locked loop inside clock driver chip to ADC acquisition and FPGA, as
The clock drive signals of ADC and FPGA；
2, standard second signal, for the synchronization and FPGA synchronization signal of triple channel acquisition, since satellite atomic clock provides
The standard second signal is input to clock driver chip in the present invention, drives three road ADC and FPGA cores by 1pps standard second signal
Piece.
Claims (8)
1. a kind of for spaceborne very low frequency solar radio radiation observation system, it is characterised in that: for the low frequency of 100KHz-20MHz
Solar radio radiation signal is observed comprising three electric-field sensors, three sets of analog receivers, digital sampling and processing, when
Frequency module, power module, memory module；Three electric-field sensors are connect with three sets of analog receivers respectively, and three sets of simulations receive
Machine, when frequency module connect respectively with digital sampling and processing, digital sampling and processing is connect with memory module, data acquisition
Processing module, three sets of analog receivers are connect with power module respectively.
2. according to claim 1 be used for spaceborne very low frequency solar radio radiation observation system, it is characterised in that: electric field sensing
Device is low-loss metal bar, and length is 5 meters or more, and three electric-field sensors are set by bracket in tri- omnidirectional distribution state of X, Y, Z
It sets on satellite, wherein X-direction is towards solar direction, and Y-axis is to be parallel to solar direction, and Z axis is constituted perpendicular to X-axis, Y-axis
Plane, that is, the three-dimensional space formed is towards the sun, for measuring X, Y, the electric field strength E in Z-directionX、EY、EZ。
3. according to claim 1 be used for spaceborne very low frequency solar radio radiation observation system, it is characterised in that: simulation receives
Machine is sequentially connected by low noise amplifier module, mimic high pass filter, two-stage amplifier, simulation low-pass filter and is formed；Its
Middle low noise amplifier module noise is less thanGain amplifier is not less than 30dB, the passband of mimic high pass filter
> 80kHz, the passband < 50MHz of simulation low-pass filter, two-stage amplifier gain are not less than 30dB, low noise amplifier module
It is connect with electric-field sensor, simulation low-pass filter is connect with digital sampling and processing.
4. according to claim 3 be used for spaceborne very low frequency solar radio radiation observation system, it is characterised in that: data acquisition
Processing module is sequentially connected and is formed by 3 high-speed AD converters, FPGA signal processing core chips, signal transmitting unit, mould
Quasi- low-pass filter is connect with high-speed AD converter；The sample rate of high-speed AD converter is not lower than 80Msps, using amount
Change digit is 10bit or more high-speed AD converter chip.
5. it is according to claim 4 be used for spaceborne very low frequency solar radio radiation observation system, it is characterised in that: when frequency module
Including spaceborne high precision clock and clock driver chip, spaceborne high precision clock is connected with clock driver chip, and clock drives core
Piece is connect with high-speed AD converter, FPGA signal processing core chips respectively；
The spaceborne high precision clock output 1pps signal amplifies through clock driver chip, as high-speed AD converter acquisition and
The synchronization signal of FPGA signal processing core chips signal processing, while the 5MHz or 10MHz of spaceborne high precision clock output
Standard signal is through amplification frequency multiplication of phase locked loop inside clock driver chip to high-speed AD converter acquisition and FPGA signal processing core
Frequency required for chip centroid works, as high-speed AD converter, the clock drive signals of FPGA signal processing core chips.
6. being used for spaceborne very low frequency solar radio radiation observation system according to claim 3 or 5, it is characterised in that: power supply
Module is made of high power D C-DC module and low noise LDO module, wherein high power D C-DC module respectively with two-stage amplifier,
High-speed AD converter, FPGA signal processing core chips, low noise LDO module, memory module are connected and are powered；Low noise
LDO module connect and powers with low noise amplifier module.
7. according to claim 6 be used for spaceborne very low frequency solar radio radiation observation system, it is characterised in that: three electric fields
Sensor, low noise amplifier module, mimic high pass filter, low noise LDO module are arranged outside satellite capsule, and low noise
Amplifier module, mimic high pass filter, low noise LDO module are arranged in independent shielding storehouse out of my cabin；Remaining group of this system
Part is placed in inside satellite capsule.
8. according to claim 4 be used for spaceborne very low frequency solar radio radiation observation system, which is characterized in that FPGA signal
Processing core chip further include:
Angle calculation module, the power that three electric-field sensor output ends are generated, ratio determines arrival bearing two-by-two, and will meter
It counts and passes ground center back according to by signal transmitting unit.
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| CN110231643A (en) * | 2019-06-28 | 2019-09-13 | 国家卫星气象中心(国家空间天气监测预警中心) | Forecasting procedure, device and a kind of storage medium and equipment of the sudden and violent event of high energy electron |
| CN110427878A (en) * | 2019-07-31 | 2019-11-08 | 中国科学院新疆天文台 | A kind of sudden and violent signal recognition method of Rapid Radio and system |
| CN111551784A (en) * | 2020-05-18 | 2020-08-18 | 山东大学 | Solar radio radiometer and spectrum observation system and control method |
| CN112350673A (en) * | 2020-11-09 | 2021-02-09 | 中国电子科技集团公司第三十八研究所 | Satellite-borne very low frequency preamplifier |
| CN113156222A (en) * | 2021-04-21 | 2021-07-23 | 山东大学 | VHF observation system, array single machine system and method |
| CN113359128A (en) * | 2021-03-09 | 2021-09-07 | 中国科学院云南天文台 | Low-frequency radio astronomical observation and ionosphere active detection system |
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